MESON Chess Problem Database

Problem Display
PID: 109084 (8/Ppk5/1N2P2n/K2PpnQ1/3P4/7B/8/8 w - - 0 1)

Olariu, Mihai Nicolae

Bucharest Cup, 1985

8/Ppk5/1N2P2n/K2PpnQ1/3P4/7B/8/8

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qd8#
    • 1...Se3
      • 2.Qe7#
    • 1...Sg3
      • 2.Qe7#
    • 1...Sxd4
      • 2.Qe7#
    • 1...Sh4
      • 2.Qe7#
    • 1...Sd6
      • 2.Qe7#
    • 1...Se7
      • 2.Qxe7#
    • 1...Sg7
      • 2.Qe7#
  • Tries
    • 1.Sa8+?
      • 1...Kd6
        • 2.Qd8#
      • 1...Kc8!
    • 1.Qc1+?
      • 1...Kd6
        • 2.Qc5#
      • 1...Kd8!
    • 1.Qg8?
      • threat
        • 2.Qb8#
      • 1...Kd6
        • 2.Qd8#
      • 1...Sxg8!
    • 1.a8Q?
      • threat
        • 2.Qgd8#
        • 2.Qad8#
      • 1...Kd6
        • 2.Qgd8#
        • 2.Qb8#
        • 2.Qad8#
      • 1...Se7
        • 2.Qxe7#
        • 2.Qxe5#
      • 1...Sf7!
    • 1.a8S+?
      • 1...Kd6
        • 2.Qd8#
      • 1...Kb8!
    • 1.a8R?
      • threat
        • 2.Qd8#
      • 1...Kd6
        • 2.Qd8#
      • 1...Se7
        • 2.Qxe7#
        • 2.Qxe5#
      • 1...Sf7!
  • Keys
    • 1.e7!
      • threat
        • 2.e8S#
      • 1...Kd6
        • 2.e8S#
      • 1...Sxe7
        • 2.Qxe7#
      • 1...Sd6
        • 2.Sa8#
      • 1...Sg7
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • K(e);S_FLIGHT::QAR2(E)
    • S(b);N_GUARD::QAR2(E)
    • S(b);N_GUARD,XP(B)::QAR2(E)
    • S(b);N_GUARD::QAR2(E),XS(b)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR2(E)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(E)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(e);S_FLIGHT::QAR2(E)
      • Refutation
        • S(c);XQ(E)
    • Try
      • P(H);
      • Threat
        • DUALS(2)
      • Refutation
        • S(c);
    • Try
      • P(H);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR2(E)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • P(H);
      • Threat
        • QAB1(E)
      • Vars
        • K(e);S_FLIGHT::QAR2(E)
      • Refutation
        • S(c);
  • Actual
    • P(G);
    • Threat
      • P=S
    • Vars
      • K(e);S_FLIGHT::P=S
      • S(b);OGATE,XP(G)::QAR2(E),XS(b)
      • S(b);SBLOCK::S(F)
      • S(b);OGATE::QAB(E),XP(a)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).